Thermochemistry is a part of chemistry that deals with the reactions of heat and matter.

Chemical pollution has a serious impact on the health of the Earth.

This shirt is made of chemical fiber.

The one-eyed goblin was dancing in the forest.

Radioactive elements are produced in nature and scientific experiments.

The International Phonetic Alphabet is an essential tool for linguistic research.

The treble clef is often used in musical scores.

He is good at reading the treble clef.

The concept of chemical equivalent is essential for understanding chemical reactions.

My company specializes in the manufacture of fine chemicals.